A new saponin lactone fromAstragalus corniculatus

Abstract A new oleanane-type saponin lactone was isolated from the ethanolic extract of the aerial parts of Astragalus corniculatus Bieb. The structure of the saponin was elucidated as 19-hydroxyolean-12-ene-28, 21β-olide 3β-D-xylopyranoside (1) by chemical and spectral methods. Keywords: Astragalus corniculatus FabaceaeSaponin Acknowledgement This work was supported by a grant 59/2003 from Medical Science Council (M. S. C.) at Medical University of Sofia.